body{
    background-color: darksalmon;
}
.empty{
    display: inline-block;
    width: 160px;
    height: 160px;
    background-color: #fff;
    margin: 5px;
    border: 3px solid salmon;
}
.fill{
    background-image: url("http://source.unsplash.com/random/150x150");
    position: relative;
    width: 150px;
    height: 150px;
    top: 5px;
    left: 5px;
    cursor: pointer;
}
.hold{
    border: solid 5px #ccc;

}
.hoverred{
    background-image: #f4f4f4;
    border-style: dashed;
}